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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Scenedesmus longus
Meyen, Syn: S. brevispina (G. M. Smith) Codat

Scenedesmus longus Genus: Colonies of 4 (or 2, 8, 16) cells attached side by side, arranged linearly or zigzag; cell body elliptical or spindle or crescent in shape; terminal cells with spiny projections in many species; cell wall usually smooth, but in some species granulated or dented or ridged (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Scenedesmus longus Meyen or S. minutus (G. M. Smith) Chodat ?, inner cell 14 μm long, 3 μm wide, L/W=4.7, outer cell 12 μm long, 3 μm wide, L/W=4, short spines present at both ends of the cells, x 640, Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 19, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus Scenedesmus

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